EP0520013A1 - Element tubulaire composite a fibres axiales adjacentes aux parois laterales - Google Patents

Element tubulaire composite a fibres axiales adjacentes aux parois laterales

Info

Publication number
EP0520013A1
EP0520013A1 EP91906701A EP91906701A EP0520013A1 EP 0520013 A1 EP0520013 A1 EP 0520013A1 EP 91906701 A EP91906701 A EP 91906701A EP 91906701 A EP91906701 A EP 91906701A EP 0520013 A1 EP0520013 A1 EP 0520013A1
Authority
EP
European Patent Office
Prior art keywords
tubular member
composite
fibers
members
oriented
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91906701A
Other languages
German (de)
English (en)
Other versions
EP0520013A4 (en
EP0520013B1 (fr
Inventor
Jerry G. Williams
Mark W. Hopkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fiberspar Corp
Original Assignee
Conoco Inc
Fiber Spar and Tube Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conoco Inc, Fiber Spar and Tube Corp filed Critical Conoco Inc
Publication of EP0520013A1 publication Critical patent/EP0520013A1/fr
Publication of EP0520013A4 publication Critical patent/EP0520013A4/en
Application granted granted Critical
Publication of EP0520013B1 publication Critical patent/EP0520013B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/006—Rigid pipes specially profiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/125—Rigid pipes of plastics with or without reinforcement electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/02—Glass fiber

Definitions

  • Coiled steel tubing finds a number of uses in oil well operations.
  • U.S. Patent No. 4,255,820 to Rothermel et al. discloses a prosthetic ligament formed with a densely woven cylindrical core that provides the axial stiffness for the prosthesis.
  • U.S. Patent No. 4,530,379 to policelli teaches a composite fiber tubing with a transition to a metallic connector.
  • the fibers may be graphite, carbon, aramid or glass. These fibers, in one embodiment, are alternatively laid in ⁇ 15° orientations to the longitudinal axis. In the Fig. 4 embodiment, "a wider choice of axial angles of filaments in the layers" is permitted. Further, “This embodiment can be employed in a fluid conveyance pipe having bending loads in addition to internal pressure loads and in structural members having bending and axial stiffness requirements". Policelli suggests that the fiber angles can be selected in a range between 5° and
  • U.S. Patent No. 4,556,340 to Morton discloses the use of an externally mounted strip on a flexible pipe.
  • the strip may be of any material having large axial stiffness in tension and low axial stiffness in compression.
  • the strip provides "brased bending" (or preferred axis of bending).
  • U.S. Patent No. 4,728,224 to Salama discloses a composite mooring tendon on interspersed layers of carbon fibers and aramid fibers, the fibers being axial or low angle helical wrap. A layer of 90° wrap fibers can be provided as an external jacket.
  • composite tubing for use in well logging and workover operation in oil wells.
  • the tubing which is preferably spoolable comprises a composite tubular member having an outer cylindrical member containing fibers oriented to resist internal pressure and provide low bending stiffness and two inner smaller members of generally sine wave configuration located near the neutral axis of the composite tubular member positioned at their bases adjacent diametrically opposite inside walls of the outer composite cylindrical member, said inner members containing fibers oriented to provide high axial stiffness, high tensile strength and low bending stiffness and containing fibers oriented to resist shear stress.
  • Figure 1 is a schematic cross-sectional view of a composite tubular member containing oppositely disposed inner members.
  • Figure 2 is a graph showing reductions in the ratio of the strain as a function of increasing the cross-ply angle for a laminate made of high strength graphite fiber.
  • Figure 3 is a schematic cross-sectional view of a composite tubular member showing the internal arrangement of fibers of differing angularities.
  • Figure 4, 5, and 6 are schematic cross-sectional views of the inner members of a composite tubular member showing alternative internal arrangements of the fibers.
  • Composite fibers (graphite, Kevlai*. fiberglass, boron, etc.) have numerous assets including high strength, high stiffness, light-weight, etc., however, the stress strain response of composite fibers is linear to failure and therefore non ductile.
  • Composite coil tubing must therefore address the strain limitations in another manner, i.e., by providing a design to meet the requirements with a near elastic response. Such a composite design must have high resistance to bending stresses and internal pressure. It must also have high axial stiffness, high tensile strength and be resistant to shear stress. All of these properties are combined in the composite tubular member of the invention to provide a coiled tubing which can be bent to a radius compatible with a reasonable size spool.
  • Figure 1 shows a cross-sectional view of a composite tubular member which is made up of a composite cylindrical member 2 and two composite inner members .4.
  • Composite cylindrical member 2 contains fibers which are cross-plied and oriented at ⁇ 55° to the axis of the tubular member.
  • the ( ⁇ ) signifies opposite orientation of the fibers at the degrees indicated. This orientation of the fibers is the optimum to achieve high structurally efficiency for outer cylindrical member 2 when such member is subjected to bending and is under internal pressure loading.
  • Outer cylindrical member 2 will usually contain from about 5 to about 10 percent fibers which are oriented at approximately 90°, that is, approximately perpendicular to the axis of the composite tubular member. The inclusion of the 90° fibers lowers the
  • the opposing inner composite members 4 contain fibers which are oriented at 0° to the axis of the tubular member to meet the requirement for high axial stiffness, high tensile strength and low bending stiffness. Axial loading and thermal expansion may cause cracks in members 4, therefore it is desirable to provide in these members, some fibers which are cross-plied and oriented at ⁇ 45° to the axis of the tubular member, to provide resistance to delamination.
  • the 45° oriented material which is resistant to shear loading may be provided either in the form of a uni-directional or woven fabric or braided material and is usually present in inner core members 4 in an amount between about 5 and about 25 percent.
  • the inner core member 4 form protuberances on the inside of tubular member 2 which are generally shaped like sine curves, as is shown in Figure 1. To reduce the strain in the 0° oriented material during bending of tubular member 2 it is desirable to have this material close to the axis of the minor moment of inertia of the tubular member cross-section. This is provided by placing inner core members 4 so that the 0° material is concentrated in diametrically opposite sides of the tubular member in the sinusoidol shape shown in which the amplitude of the sine curve configuration is about 0.5 to 3 times the base of such configuration.
  • Good strength in shear and transverse tension of the 0° oriented material in its attachment to outer composite cylindrical member 2 may be obtained by encapsulating the 0° oriented material with ⁇ 45° cross-ply material and adhering the ⁇ 45° material to the outer composite cylindrical member.
  • the fibers contained in the outer cylindrical member and the inner core members are held together with a plastic binder such as vinyl ester, epoxy, or a thermoplastic or thermosetting resin.
  • a plastic binder such as vinyl ester, epoxy, or a thermoplastic or thermosetting resin.
  • Fibers of different materials and different resins may make it advantageous to use fibers of different materials and different resins for the two components of the composite tubular member.
  • the high stiffness and high strength requirements of the inner core members may best be met by using 0° graphite fibers.
  • lower cost and higher strain to failure of glass fibers may make fiber glass the material of choice for the outer cylindrical member.
  • Other fibers which also may be used are ceramic fibers, polymer fibers, for example, from Kevlar* polymer which is a product of the Du Pont Company and from Exten ⁇ polymer which is product of The Goodyear Corporation.
  • the plastic binders mentioned, among others may be used in the preparation of the components of the composite tubular member from these materials.
  • the size of the various components in the composite tubular member will depend on the size of this member. If the composite tubular member is used as coiled tubing, it will usually have a diameter of not more than about 2 inches.
  • the outer composite cylindrical member in a coiled tubing will have a thickness of between about 0.15 and about 0.40 inches.
  • the inner core members of such coiled tubing will have an amplitude of between about 0.25 and about 15.0 inches and a base between about 0.5 and about 5.0 inches.
  • Kevlar* frit may be used for this purpose.
  • the composite tubular member may buckle and at the points of buckling, impose a normal force on the walls of the casing or open hole. This force will create friction as the tubular member is moved down the hole.
  • the exterior of the composite tubular member may be covered with a protective abrasion resistant cover 6 to resist such wear and friction.
  • Kevlar*, Teflon*, Nylon, Rilsan*, Hytrel* or Kevlar* frit may be used to form this protective covering.
  • the axial strain in the cross-plied fiber in the outer cylindrical member of the composite tubular member due to bending is significantly lower than would be similarly placed 0° oriented fibers.
  • Typical reductions in the ratio of fiber strain to the imposed axial strain for a cross-plied laminate presented as a function of the cross-ply angle are presented in the graph of Figure 2 using representative properties of a high strength graphite fiber. It is noted that for angles greater than approximately ⁇ 25° the fiber strain is less than half the axial strain imposed on the laminate and rapidly reduces for larger cross-ply angles. Orienting the fibers in the outer cylindrical member in the manner described herein, optimizes the ability of the composite tubular member to carry the imposed set of loads and minimizes the strain in the fibers due to bending.
  • Minimizing the bending strain in the fibers permits large diameters for the outer cylindrical member portion of the composite tubular member than would be otherwise possible for a specific spool size. Conversely a given diameter composite tubular member so tailored, can be wound onto a smaller diameter spool.
  • the cylindrical shape of the composite tubular member is also well suited for introducing such member into the well with the belt drive mechanism which is normally used to force the tubular member downhole.
  • the configuration of the composite tubular member of the invention creates a major and minor moment of inertia and forces a preferred direction of bending. In effect, this forces the composite tubular member to wind onto a spool by bending about the minor moment of inertia.
  • the buckle pattern will be a mixed mode having one period associated with the minor moment of inertia and a longer. smaller curvature mode associated with the major moment of inertia.
  • the advantage of this configuration is that high stiffness and high strength material can be placed in the composite inner core without significant increase in the associated bending strains or sacrifice in the minimum radius curvature permitted for spooling.
  • the broken lines within the bodies of the tubulars indicate the orientation of the fibers in a layer of the tubular.
  • the dotted lines indicate fibers oriented approximately 0° to the axis of the tubular.
  • Lines formed by alternating dots and dashes indicate fibers oriented approximately ⁇ 40° to ⁇ 60° to the axis of the tubular.
  • FIG. 3 illustrates the internal arrangement of the fibers for a composite tubular member such as that shown in Figure 1.
  • the angularity of the various fibers in the composite tubular member is represented by single lines as is shown in the legend. Each line represents a number of fiber thicknesses or a number of fiber plies.
  • FIG 3 16 designates the outer abrasive cover, and 18 the inner abrasion and chemically resistant liner for the composite tubular member. As shown in the drawing, the composite inner cores are made up of 0° oriented
  • the cross-plied fibers are usually contained in a uni-directional or woven fabric which as shown, may be extended from the core members to join them with the outer cylindrical member of the composite tubular member. For structural continuity and sealing, at least part of the ⁇ 45° web material is continued around the inner portion of the outer cylindrical member.
  • the 0° oriented fibers may also be provided in cloth or fabric form, however, this material is usually present as ravings, i.e. bundles of fibers.
  • the outer composite cylindrical member contains primarily ⁇ 55° cross-plied fibers with a small amount of ⁇ 90° oriented fibers.
  • the fibers in the composite tubular member are held together or laminated with a suitable plastic binder which is not shown in the drawing.
  • Figures 4, 5, and 6 show various internal arrangements of the fibers in the composite inner cores.
  • the 0° and ⁇ 45° oriented fibers are both shown in a generally elliptical configuration.
  • Figure 5 the
  • 0° oriented fibers are concentrated in the inner portion of the core as designated by 20.
  • both the 0° oriented fibers and the ⁇ 45° oriented fibers are arranged in a linear configuration which is parallel to the axis of the minor moment of inertia of the composite tubular member.
  • both the sine wave portion and base portion of the core members are enclosed by ⁇ 45° oriented fibers which are continued entirely around the core members and onto the inner surface of the outer cylindrical composite member to resist shear stress and delamination.
  • the ⁇ 45° fibers which are utilized in the inner composite core members in part are of the preferred orientation, however, it is within the scope of the invention to use fibers oriented from ⁇ 40° to ⁇ 60° in the core members.
  • ⁇ 55° oriented fibers are preferred for use in the outer cylindrical composite member for same design requirements, fibers oriented from ⁇ 40° to ⁇ 70° may be used without departing from the scope of the invention.
  • the fiber sequence or stacking sequence of the ⁇ 55°, 0°, 90° and ⁇ 45° fiber orientations shown in the drawings is only representative - 8 - and may be varied to meet specific design requirements.
  • the composite tubular members of the invention may be used in subsea hydraulic lines or as production tubing in which long sections of tubing are spooled and run downhole for permanent production.
  • Production tubing is normally larger in diameter than is required of coiled tubing and may become too large to bend onto a practical diameter spool. If tubing diameters become too large for spooling, it is entirely feasible to manufacture the composite tubular members on site, on shore or offshore. Larger spool sizes are practical for offshore where the composite tubular member can be manufactured near a dock site.
  • Pressure pulsing can also aid in freeing the coiled composite tubing stuck downhole.
  • several well known techniques may be use such as pultrusion, filament winding and molding.
  • filaments or fibers are drawn through a resin impregnating apparatus, then through dies to provide the desired shapes, or alternatively, the resin may be injected within the die. Heat forming and curing means are provided in conjunction with the dies.
  • the desired product which is produced continuously may be wound onto a reel or spool.
  • pultrusion is used in U.S. Patent 4,416,329 to prepare a ribbon structure containing - 9 - bundles of graphite fibers saturated with thermoplastic resin.
  • U.S. Patent 4,452,314 uses pultrusion to form arcuate sections comprised of glass filaments or other reinforcing material disposed in a thermosetting resin. The arcuate sections are combined to form a sucker rod.
  • the composite tubular members of the invention may be manufactured using either conventional pultrusion or pull winding equipment or pultrusion in combination with braiding or filament winding.
  • the 0° oriented material is pultruded in advance and guided into a like shaped recess on a pultrusion mold and subsequently pultruded jointly with the cross-ply material.
  • Pultrusion can be used to make either continuous or discrete length composite tubular members.
  • the 0° oriented material is either fed into the process as a prefabricated rod or fed into the assembly as a pre-preg tape or wet layout.
  • Cross-ply material is then wound onto the tube and the assembly is pulled through a die for integral curing.
  • the pultrusion process may utilize material which is prepared by weaving or braiding the fibers. Woven or braided material can be prepared as feed stock or can be fabricated on-line as a part of the pultrusion operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Glass Compositions (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

Elément tubulaire composite comportant un élément cylindrique extérieur (6) contenant des fibres orientées pour résister à une pression interne et pour conférer une faible rigidité de flexion, ainsi que deux éléments intérieurs d'âme plus petits (4) situés à proximité de l'axe neutre des éléments tubulaires composites contenant des fibres orientées pour conférer une rigidité axiale élevée, une résistance à la traction élevée et une faible rigidité de flexion, ainsi que des fibres orientées pour résister à l'effort de cisaillement, positionnées les unes en face des autres et adjacentes aux parois intérieures (8) de l'élément cylindrique extérieur.
EP91906701A 1990-03-15 1991-03-12 Element tubulaire composite a fibres axiales adjacentes aux parois laterales Expired - Lifetime EP0520013B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/495,010 US5176180A (en) 1990-03-15 1990-03-15 Composite tubular member with axial fibers adjacent the side walls
US495010 1990-03-15
PCT/US1991/001651 WO1991014123A1 (fr) 1990-03-15 1991-03-12 Element tubulaire composite a fibres axiales adjacentes aux parois laterales

Publications (3)

Publication Number Publication Date
EP0520013A1 true EP0520013A1 (fr) 1992-12-30
EP0520013A4 EP0520013A4 (en) 1993-01-13
EP0520013B1 EP0520013B1 (fr) 1998-01-21

Family

ID=23966872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91906701A Expired - Lifetime EP0520013B1 (fr) 1990-03-15 1991-03-12 Element tubulaire composite a fibres axiales adjacentes aux parois laterales

Country Status (8)

Country Link
US (1) US5176180A (fr)
EP (1) EP0520013B1 (fr)
JP (1) JP3369554B2 (fr)
AU (1) AU7579791A (fr)
CA (1) CA2076391E (fr)
DE (1) DE69128778D1 (fr)
NO (1) NO314101B1 (fr)
WO (1) WO1991014123A1 (fr)

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Also Published As

Publication number Publication date
CA2076391E (fr) 2002-08-20
JPH05505228A (ja) 1993-08-05
WO1991014123A1 (fr) 1991-09-19
CA2076391C (fr) 1996-11-19
NO923565D0 (no) 1992-09-14
AU7579791A (en) 1991-10-10
CA2076391A1 (en) 1991-09-16
EP0520013A4 (en) 1993-01-13
EP0520013B1 (fr) 1998-01-21
NO923565L (no) 1992-09-14
US5176180A (en) 1993-01-05
DE69128778D1 (de) 1998-02-26
JP3369554B2 (ja) 2003-01-20
NO314101B1 (no) 2003-01-27

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